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ADT7476AARQZ-R Datasheet(PDF) 4 Page - ON Semiconductor |
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ADT7476AARQZ-R Datasheet(HTML) 4 Page - ON Semiconductor |
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4 / 69 page  ADT7476A www.onsemi.com 4 Table 3. ELECTRICAL CHARACTERISTICS (continued) (TA =TMIN to TMAX, VCC =VMIN to VMAX, unless otherwise noted) (Note 1) Parameter Unit Max Typ Min Conditions Fan RPM-to-Digital Converter Accuracy 0 °C ≤ TA ≤ 70°C −40 °C ≤ TA ≤ +120°C − − − − ±6 ±10 % Full-Scale Count − − 65,535 Nominal Input RPM Fan Count = 0xBFFF Fan Count = 0x3FFF Fan Count = 0x0438 Fan Count = 0x021C − − − − 109 329 5,000 10,000 − − − − RPM Open-Drain Digital Outputs, PWM1 TO PWM3, XTO Current Sink, IOL − − 8.0 mA Output Low Voltage, VOL IOUT = −8.0 mA − − 0.4 V High Level Output Current, IOH VOUT = VCC − 0.1 20 mA Open-Drain Serial Data Bus Output (SDA) Output Low Voltage, VOL IOUT = −4.0 mA − − 0.4 V High Level Output Current, IOH VOUT = VCC − 0.1 1.0 mA SMBus Digital Inputs (SCL, SDA) (Note 2) Input High Voltage, VIH 2.0 − − V Input Low Voltage, VIL − − 0.8 V Hysteresis − 500 − mV Digital Input Logic Levels (TACH Inputs) Input High Voltage, VIH Maximum Input Voltage 2.0 − 5.5 V Input Low Voltage, VIL Minimum Input Voltage −0.3 − 0.8 V Hysteresis − 0.5 − V p-p Digital Input Logic Levels (THERM) ADTL+ Input High Voltage, VIH 0.75 × VCCP − − V Input Low Voltage, VIL − − 0.8 V Digital Input Current Input High Current, IIH VIN = VCC − ±1 − mA Input Low Current, IIL VIN = 0 − ±1 − mA Input Capacitance, CIN − 5.0 − pF Serial Bus Timing (See Figure 2) Clock Frequency, fSCLK 10 − 400 kHz Glitch Immunity, tSW @ 100 kHz − − 50 ns Bus Free Time, tBUF @ 100 kHz 4.7 − − ms SCL Low Time, tLOW @ 100 kHz 4.7 − − ms SCL High Time, tHIGH @ 100 kHz 4.0 − 50 ms SCL, SDA Rise Time, tr @ 100 kHz − − 1,000 ns SCL, SDA Fall Time, tf @ 100 kHz − − 300 ms Data Setup Time, tSU;DAT @ 100 kHz 250 − − ns Detect Clock Low Timeout, tTIMEOUT Can be Optionally Disabled 15 − 35 ms Product parametric performance is indicated in the Electrical Characteristics for the listed test conditions, unless otherwise noted. Product performance may not be indicated by the Electrical Characteristics if operated under different conditions. 1. All voltages are measured with respect to GND, unless otherwise specified. Typical voltages are TA =25°C and represent a parametric norm. Logic inputs accept input high voltages up to VMAX, even when the device is operating down to VMIN. Timing specifications are tested at logic levels of VIL = 0.8 V for a falling edge, and VIH = 2.0 V for a rising edge. 2. SMBus timing specifications are guaranteed by design and are not production tested. |
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